Does JSON Array Length upload my file or text to Tool-You servers?

No. JSON Array Length runs in this browser tab. Files stay on the device. Limit note: JSON array only.

Should I use JSON Key Count instead of JSON Array Length?

Use JSON Array Length when you need Length of a JSON array. Use JSON Key Count when you need Count top-level JSON object keys. They share a category (Convert) but not the same job.

JSON Array Length

Length of a JSON array.

Parses JSON and returns array length. Unlike JSON Key Count this requires an array. Non-array fails.

What JSON Array Length does

Parses JSON and returns array length. Unlike JSON Key Count this requires an array. Non-array fails.

The interactive controls for JSON Array Length load after this article so crawlers still read the instructions. Path /convert/json-array-length is the canonical address. Work happens on this device; Tool-You does not take a copy of the file or pasted text for JSON Array Length.

How to use JSON Array Length

Keep this tab on JSON Array Length (/convert/json-array-length). Pasting into the wrong Convert tool (for example JSON Key Count) changes the job.
Paste or type the input JSON Array Length expects. Path hint: convert · json array length. Length of a JSON array.
Apply the JSON Array Length action only. Is JSON Array is a different transform (Is JSON array with type.). Parses JSON and returns array length. Unlike JSON Key Count this requires an array. Non-array fails.
Copy the output of JSON Array Length if you need it elsewhere. Size/complexity still follows: JSON array only.
If the text job is actually Count top-level JSON object keys., leave JSON Array Length and open JSON Key Count.

When not to use JSON Array Length

Skip JSON Array Length when a neighbor tool matches better — start with JSON Key Count or Is JSON Array — or when the description already warns the job will fail. In the tool’s own words: Parses JSON and returns array length. Unlike JSON Key Count this requires an array. Non-array fails.

Questions about JSON Array Length

What does JSON Array Length do that other Convert pages on this site do not?: Parses JSON and returns array length. Unlike JSON Key Count this requires an array. Non-array fails. Short version: Length of a JSON array.
Does JSON Array Length upload my file or text to Tool-You servers?: No. JSON Array Length runs in this browser tab. Files stay on the device. Limit note: JSON array only.
Should I use JSON Key Count instead of JSON Array Length?: Use JSON Array Length when you need Length of a JSON array. Use JSON Key Count when you need Count top-level JSON object keys. They share a category (Convert) but not the same job.
What are the limits of JSON Array Length?: JSON array only. Also: Parses JSON and returns array length. Unlike JSON Key Count this requires an array. Non-array fails.